/*******************************************************************************
 * Copyright 2006, 2017 Jerry Huxtable, Martin Davis
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/*
 * This file was semi-automatically converted from the public-domain USGS PROJ source.
 */
package org.locationtech.proj4j.proj;

import org.locationtech.proj4j.ProjCoordinate;


public class DenoyerProjection extends Projection {

	public final static double C0 = 0.95;
	public final static double C1 = -.08333333333333333333;
	public final static double C3 = 0.00166666666666666666;
	public final static double D1 = 0.9;
	public final static double D5 = 0.03;

	public ProjCoordinate project(double lplam, double lpphi, ProjCoordinate out) {
		out.y = lpphi;
		out.x = lplam;
		double aphi = Math.abs(lplam);
		out.x *= Math.cos((C0 + aphi * (C1 + aphi * aphi * C3)) *
			(lpphi * (D1 + D5 * lpphi * lpphi * lpphi * lpphi)));
		return out;
	}

	public boolean parallelsAreParallel() {
		return true;
	}

	public boolean hasInverse() {
		return false;
	}

	public String toString() {
		return "Denoyer Semi-elliptical";
	}

}
